S变换时频分析在隧道岩溶地震勘探解释中的应用

介绍了短时傅立叶变换、小波变换和S变换的优缺点及其彼此间的相互关系。详述了S变换的概念及性质,认为S变换方法具有良好的自适应性和时频分辨率,能提供高质量的时频谱信息。将S变换时频分析用于宜万铁路隧道地震映像法数据解释。结果表明,S变换时频剖面上的溶洞异常显示比时间剖面更为清晰,在推断岩溶的分布位置、大小、埋藏深度等方面具有良好效果。S变换方法有助于提高地震数据解释的精度和准确性。

Application of S-Transform Time-Frequency Analysis in Seismic Prospection Interpretation for Karst Caves Under Tunnel

This paper shows the advantages,disadvantages and correlation of Short-Time Fourier Transform,Wavelet Transform and S-Transform.Expatiating the idea and property of the S-Transform,we find that the S-Transform method has favorable self-adaptability and time-frequency resolution and can provide high-quality time-frequency information.We use S-Transform Time-Frequency Analysis to interpret seismic imaging data under tunnel of YiChang-WanZhou Railway.The result indicates that the abnormal karst caves represent...